modrého

Modrého is the genitive singular form of the Czech adjective modrý, meaning blue. It is used when the noun it describes is in the genitive case, and it can modify masculine or neuter nouns. The feminine genitive singular form of modrý is modré.

In Czech grammar, adjectives agree with the noun in gender, number, and case. In the genitive singular, masculine and neuter forms are modrého, while feminine is modré. The form modrého also appears in various phrases and compound structures where the color is described in genitive.

Examples of usage include: barva modrého nebe (the color of the blue sky); tón modrého světla (a tone of blue light); odstín modrého moře (a shade of blue sea). These constructions show how modrého functions to attribute the color blue to a noun in genitive.

Etymology: modrý derives from the Proto-Slavic root *modrъ, and is cognate with related terms for blue in other Slavic languages. The genitive form modrého reflects regular patterns of Czech adjective declension.

Modrého is a grammatical form rather than a standalone concept; it appears in written and spoken Czech whenever a masculine or neuter noun in genitive is described as blue. Related forms include modrý (nominative masculine), modrá (nominative feminine), and modré (genitive feminine).